extinction curve मीनिंग इन हिंदी

The form of the standard extinction curve depends on the composition of the ISM, which varies from galaxy to galaxy.
It is calculated by multiplying the standard atmospheric extinction curve by the mean airmass calculated over the duration of the observation.
Astronomical observatories generally are able to characterise the local extinction curve very accurately, to allow observations to be corrected for the effect.
In the Local Group, the best-determined extinction curves are those of the Milky Way, the Small Magellanic Cloud ( SMC ) and the Large Magellanic Cloud ( LMC ).